Mercruiser outdrive parts drawing *Videos *SEI sterndrive

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Lower unit Mercruiser parts *Outdrive parts drawing 1 to 43

GLM aftermarket outdrive layout with exploded view illustrated lower unit parts drawing

Mercruiser MC-1-R parts drawing

Mercruiser MC-1-R lower unit gearcase parts drawing years 1972 to 1982

Mercruiser propeller

Mercruiser propeller

A
Mercury propellers from Solas
18100 Alpha 1 lower unit complete

SEI Marine Alpha 1 lower unit complete

1B 
SEI Marine aftermarket complete lower unit parts
Outdrive years 1972 to 1990 with 2 year limited warranty. No core deposit required. $999.95

87510 Seal kit lower gearcase

87510 Seal kit lower gearcase

P/N 87510 Seal and gasket kit $42.95
GLM 87510 Mercruiser OEM number 26-33144A2
Lower unit seal kit $38.95
M1 / R / MR / Alpha 1 years 1964 to 1990
Serial numbers 1684188 - OD469858
The following parts included:
  • P/N 12830 Seal 25-39970
  • P/N 81160 O-ring 25-30613
  • P/N 81390 O-ring 25-90011
  • P/N 81180 O-ring 25-25439
  • P/N 31020 Gasket 25-858524
  • P/N 31050 Gasket 27-42631-1
  • P/N 31010 Gasket 27-85608-1
  • P/N 85040 Oil seal 26-16977
  • P/N 85070 Oil seal 26-89238
  • P/N 85700 Oil seal 26-12224
  • P/N 85581 Oil seal 26-816464
  • P/N 85140 Seal 26-45577-1
  • P/N 21330 Slinger 25-30271
  • P/N 21010 bushing parts 23-30617A2
For 1991 and newer models, use Mercury part 26 816575A3.

25125 Alpha gears bearings shims 13-21

25125 Alpha gears bearings shims 13-21

P/N 25115 Seals, bearings and gear set parts included in kit
Mercruiser OEM number 43-803079T1 contains the following parts included:
  • Gear set 43-96084A4
  • Sliding clutch dog 52-66063
  • Roller bearing 3130895
  • Ball bearing 30-88957A1
  • Tapered bearing 31-35928A1
  • Shim kit 15-47397
  • Pinion nut 11-35921
  • Tab washer 14-79447
  • Seal kit #87510 26-32511A1

GLM Marine aftermarket tools that may be required for repairs are: drive shaft adaptor and pinion nut adaptor
Part number 90220 drive shaft adaptor tool provides a wrench surface to turn the drive shaft when installing the drive shaft pinion nut.
Part number 90210 pinion nut adaptor kit holds pinion nut when removing pinion gear, pinion gear nut and Mercruiser drive shaft on outdrive unit years 1972 and up

25110 shims bearings upper gearcase

25110 shims bearings upper gearcase

C
Part number 25110 Seal, shims and bearings set
31-803068T1 $233.95

12110 water pump

12110 water pump

P/N 12110
Water pumps for outdrive years 1970 thru 1983 Mercruiser models,
Mercruiser 1 / R Serial numbers 2763442 - 6854392 $39.95

GLM Marine aftermarket parts includes:

  • P/N 89840 / 47-89984T4 Impeller
  • P/N 12510 / 32435 Wear plate
  • P/N 12310 / 46-57234T1 water pump base
  • P/N 31010 / 27-85608-1 Gasket
  • P/N 11070 / 28-56654 Key
  • P/N 12410 / 46-96148T1 Water pump housing
  • P/N 12820 / 23-29804T Guide tube
  • P/N 12810 / 48752 Cup

12130 serial number 2062141 to 2791956

12130 serial number 2062141 to 2791956

P/N 12130 GLM Marine water pump assembly
with flush screw. $69.95

Compatible with the Mercruiser 1 model years 1965 - 1969.
Mercruiser serial numbers 2495186 - 2763441
The following parts includes:
  • P/N 89840 / 47-89984T4 Water pumps impeller
  • P/N 11070 / 28-56654 Key
  • P/N 12410 / 46-96148T1 Pump housing
  • P/N 12333 / 46-48748T1 Pump base
  • P/N 12820 / 23-29804T Guide tube
  • P/N 12810 / 48752 Pump cup
  • P/N 12510 / 32435 Wear plate
  • P/N 31010 / 27-85608-1 Gasket

12410 housing

12410 housing

2
Part number 12410 Water pump housing $29.95

12810 Cup OEM 48752

12810 Cup OEM 48752

# 12810 Water pump cup for the MC-1/R $5.95

89840

89840

4
# 89840
Mercruiser impeller $13.95
  • GLM 89840 OEM 47-89984-2 Mercury impeller $13.95
  • Mercruiser 1 / R / Alpha 1
  • (1967 - 1990

21720 Alpha 1 washers

21720 Alpha 1 washers

5
Manufacturer part number 21720
Washers - parts sold in units of three $4.95

12821 Bolt

12821 Bolt

 

6
P/N 12821
Screw for the water pump cover $10.95

21180-lock-nuts.JPG

21180 lock nuts

7
GLM part number 21180
Nuts *5 parts included $6.95

12830

12830

8
#
12830 Seal
12820 guide tube

12820 guide tube

9
Part number 12820
Guide tube for MC-1/R/MR only 1 part included $6.95

81160 o-ring for drive shaft

81160 o-ring for drive shaft

10
# 81160
O-ring $4.95
21190 lock nuts

21190 lock nuts
(5 parts included)

11
P/N 21190
Nuts (5 parts included) OEM 11-13436 $9.95

21490 Washers

21490 Washers

12
# 21490
Washers *10 parts included $15.95

11070 Alpha 1 Impeller key

11070 impeller key

13
# 11070 Key *1 unit
28-56654 $9.95

31020

31020

Item 14
P/N 31020
Gasket water pump gasket

12510 impeller wear plate

12510 impeller wear plate

15
# 12510
wear plate
31010 lower wear plate gasket

31010 lower wear plate gasket

16
# 31010
Gasket
12310 GLM aftermarket Mercruiser pump base
12310 GLM pump base
17
# 12310
Water pump base
85040 Alpha 1 oil seal

85040 oil seal

18
# 85040
Oil seal $9.95
85070 oil seal

85070 oil seal

19
# 85070
Oil seal $10.95
81390 o ring water pump base

81390 o ring water pump base

20
# 82260
O-ring
31040 pump base to gear housing

31040 pump base to gear housing

21
# 31040
Gasket
S-21570-1970-1983-Bearing.jpg

21570 bearing

22
# 21570
Roller bearing $24.95

23300 shim kit

23300 shim

P/N 23300

21800 washers

21800 washers

24
# 21800
Washer *5 parts included Mercruiser OEM number 12-29395 $4.95

30010 gasket

30010 gasket

Item 25
P/N 30010
Shift shaft gasket washer (5 units) OEM 12-31266 $4.95

85581 oil seal

85581 oil seal

Item 26
P/N 85581
Oil Seal *Included in P/N 87510 parts*

21010 bushing assembly

21010 bushing assembly

Item 27
P/N 21010
Bushing assembly *Included in P/N 87510 seal kit

81180 o-ring shifter

81180 o-ring shifter

Item 28
P/N 81180
O-Ring *Included in P/N 87510 parts

32790 washers

32790 washers

Item 29
P/N 32790
Washer *10 units OEM 12-27880 $4.95

21132 clip

21132 clip

Item 30
P/N 21132
Clip OEM 18-20233 $4.95

21030 lower shift shaft

21030 lower shift shaft

Item 31
P/N 21030
Shift shaft OEM 77481-1 $37.95

85140 Oil passage seal

85140 Oil passage seal

Items 32
P/N 85140
Seal OEM 26-45577-1 (5 units) $9.95

Included in P/N 87510 parts

Lower unit oil pump

Lower unit oil pump

Items 33A
P/N 401-11245-1 Mercruiser lower unit oil pump $12.95

401-11245-1

21731 Draining set

21731 Draining set

Item 33B
P/N 21731
Oil plug magnetic drain screw OEM 22-67892A1 $9.95

31170 Gasket for housing drain

31170 Gasket for housing drain

Item 34
P/N 31170
Washer Included in seal kit P/N 87510

21870 insert screen

21870 insert screen

Item 35
P/N 21870 Insert screen (stbd) OEM 93423-1 $4.95

21880 insert screen

21880 insert screen

Item 36
P/N 21880 Insert screen port side OEM 93424-1 $4.95

12822 Alpha 1 insert screen screw

12822

Item 37
GLM part number 12822 Screw *5 units OEM 10-76156 $9.95

21161 stainless steel lock nut

21161 stainless steel lock nut

Item 38
P/N 21161 Stainless steel lock nut OEM 11-45812 $4.95

21170 lock nuts 5 units

21170 Lock nuts 5 units

Item 39
P/N 21170 Lock nuts *5 units OEM 11-13439-1 $9.95

21740

21740

Item 40
P/N 21740 trim tab screw *2 units OEM 10-32470 $5.95

22430 Allen bolt

22430 Allen bolt

Item 41
P/N 22430 Bolt OEM 10-30206 $4.95

12670 Anode

12670 Anode

Item 42
P/N 12670 Trim tab anode OEM 31640A1 $9.95

T-21600-bearing.jpg

21600 bearing

Item 43A
P/N 18-1150 Drive shaft OEM 31-92366A1 MC-1 / R serial 4893835 - 62255757 $75.29

21610 Johnson-Evinrude lower unit pinion bearing
21610 Drive shaft pinion gear bearing
Item 43B
P/N 21610 Drive shaft pinion bearing OEM 31-42647A1 MR / Alpha 1 serial 6225577 and up $43.95

Customers also looked at:

21450 Shift cable 865436A03

21450 Shift cable 865436A03

P/N 21450 Complete outdrive shift cable kit. Includes cable, shift bellow, outdrive installation gasket kit and other parts. Replaces Mercury 865436A03 and Sierra 18-2603. $89.99

21950 Alpha 1 adhesive hinge pin tool 30-803097T1

21950

P/N 21950K *most popular* Same kit as above, also includes bellows adhesive glue and hinge pin removal/installation tool$179.99

21960 Generation 2 exhaust u-joint

Complete repair kit

P/N 21960K *most popular For Generation 2 models only, 1991 and up. Also includes bellows adhesive glue and hinge pin removal/installation$204.99

M 12120 Impeller kit 1984-1990 46-44292A5

12120 Impeller kit

P/N 12120 Mercruiser Alpha One Gen 1 impeller water pump kit, for 1984-1990 models, serial numbers 6854393-OD469858. Replaces OEM and Sierra 18-3320. $35.99

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